mark kibort

I thought after years of debates and continual conditional perception and disagreements of the many factors of driving a race car fast . (both on a road course and straight line)
I thought this might be a good safe place for those that still want to talk discuss these factors without arguments based on driver or conditions.

Rules of this thread. Ask questions of any nature relating to the physics of racing. Anyone can answer, but be prepared to state your case. No driver or conditions are to be factored into the answers, unless that is part of the question. No bickering, name calling, insults. Just keep it factual. If you dont agree to an idea or claim, post why and show evidence of your postion.

This might be a place to find the most common of racing physics questions and their answers with out having to dig though the other threads that ended up in massive side bar debates. It will be easier to find the answer if there is less noise from those that disagree with a point, and more discussion.

This is an informational thread, not a battle ground.

Example topics might be

HP vs. Torque and their relationships to acceleration or speed(Engine or drive wheels)
HP vs aerodynamic losses
shift points
gearing
weight transfer (handling issues, cause and effect, scaling similarities)
Weight effects on acceleration (rotational vs linear, tires/wheels vs flywheel)
aerodynamics (wings, splitters, gurney flaps, underbody panels, diffusers, etc)

Willard Bridgham 3

I may be preaching to the choir, but this will be a helpful resource for this thread


http://phors.locost7.info/contents.htm

KaiB

Could we discuss octane development, specific gravity, RVP, oxygenates, aromatics and latent heat with respect to race fuels vs. av gas - and how their differences may affect combustion and performance in our engines.

My degrees are in Chemistry/Mathmatics and I've spent half a lifetime cleaning fuels out of soils and groundwater. The other day I had a long conversation with Steve W. who, despite the fact that he has no clue about air cooled engines, was able to impress me with long words and seemingly important statements about fuel travel, flame propagation, fuel cooling properties and a raft of stuff about intake systems, head design and plenum vagarities.

mark kibort

Im very interested in the story of Av gas vs Race gas and their diffrences besides the octane rating that seems to set them apart.

Does octane effect flame front rate of combustion? does this depends on the fuel formula, as welll as octane combined? It seems there is formulations of Fuel tha progate faster than others and maybe there is a mix of high octane fuels vs a mix of low octane fuels that both inhearently have different burn rates, that can end up very similar with respect to burn rates.

If octane has to do with knock prevention, this means it has to inhibit pre-ignition as well. I would also think that the burn rate woudl be effected.

Some mention latent heat effect, due to varied vaporization rates. some also think that this can lower CHTs. Is this possible, or could it be only int he area of spot cooling of the back of the valves?

With seeminly contradictory writings of folks that seem to be intimately involved in the fuel chemstry world, it can be a little confusing.

with so many factors, I woudl think this topic might dersve its own thread.

KaiB

I dunno, I'm a redneck.

Ask Steve Weiner.

Larry Herman

Veloce Raptor

Hahahaaa!!

Gator_86_951

When you push the pedal all the way to the right the car goes faster

winders

Which pedal do you push all the way to the right?

Scott

Gator_86_951

I am told it is called the "throttle." Have you heard of this thing? It is separately called the "loud peddle" or the "wallet emptier."

winders

What happens when you push the throttle pedal all the way to the right?

Scott

bobt993

Scott, don't push the pedal all the way to the right it will break. Push the pedal on the right downward and you will go faster forward.

Veloce Raptor

LMAO

kurt M

On my 912 the skinny pedal on the right does not do much of anything when I push on it. right, left, up, down, charmed, strange, oh wait those are quarks, wrong forum.

Larry Herman

I thought that we were talking about Fizzicks?